Changes to the drive and directory popped from the directory stack. The directory stack is filled using the PUSHD command.

$ C:\\Users\\kjk
$ pushd src

$ C:\\Users\\kjk\\src
$ popd

Links:

$ popd /?
Changes to the directory stored by the PUSHD command.

POPD

If Command Extensions are enabled the POPD command will delete
any temporary drive letter created by PUSHD when you POPD that
drive off the pushed directory stack.